Liquid flask



FIG. 1 is a front elevational view of a liquid flask showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof.

The “She-Devil” graphic shown in FIGS. 1-4 and 7 of the claimed design is a registered trademark of Chris Warner. 

The ornamental design for a liquid flask, as shown and described. 